/* ============================================================
   一舟集 Little Boat · 极简文艺风个人博客
   纯静态 · 无依赖 · 支持中英切换与自动深色模式
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --bg: #faf8f4;            /* 暖纸色背景 */
  --ink: #221f1b;           /* 正文墨色 */
  --muted: #857c70;         /* 次要文字 */
  --faint: #dccfc0;         /* 装饰性淡色 */
  --rule: #e8e1d5;          /* 分隔线 */
  --accent: #a4553e;        /* 朱砂点缀 */
  --code-bg: #f0e9dd;
  --serif: "Georgia", "Times New Roman", "Songti SC", "Noto Serif CJK SC",
           "Source Han Serif SC", "SimSun", serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, Menlo, monospace;
  --maxw: 41rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181511;
    --ink: #e8e2d8;
    --muted: #9b9186;
    --faint: #453e35;
    --rule: #2b251e;
    --accent: #d18b6c;
    --code-bg: #231e18;
  }
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink);
  background: var(--bg);
  transition: background-color .35s ease, color .35s ease;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

img { max-width: 100%; height: auto; }

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

::selection { background: var(--accent); color: var(--bg); }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: 1.5rem;
}

/* ---------- 中英双语切换 ----------
   <html data-lang="zh|en"> 由内联脚本在渲染前写入，避免闪烁 */
html[data-lang="zh"] .lang-en { display: none !important; }
html[data-lang="en"] .lang-zh { display: none !important; }
html:not([data-lang]) .lang-en { display: none; }

/* ---------- 入场渐显（仅在 JS 可用时不遮挡内容） ---------- */
html.js .fade {
  opacity: 0;
  transform: translateY(10px);
}
html.js .fade.in {
  opacity: 1;
  transform: none;
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--d, 0s);
}

/* ---------- 顶部 ---------- */
.site-head {
  padding-top: 2.75rem;
  padding-bottom: 2.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
}

.brand .dot {
  color: var(--accent);
  font-weight: 400;
  margin-left: .05em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.site-nav a {
  font-size: .92rem;
  color: var(--muted);
  letter-spacing: .05em;
  padding-bottom: .15em;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.site-nav a:hover { color: var(--ink); }

.site-nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.lang-toggle {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: .28rem .78rem;
  transition: color .2s ease, border-color .2s ease;
}

.lang-toggle:hover {
  color: var(--ink);
  border-color: var(--muted);
}

/* ---------- 首页 Hero ---------- */
.hero {
  padding: 3.6rem 0 3.4rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.monogram {
  flex: 0 0 auto;
  width: 4.6rem;
  height: 4.6rem;
  border: 1px solid var(--rule);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.7rem;
  color: var(--accent);
  background: linear-gradient(160deg, transparent 55%, var(--faint) 130%);
}

.hero h1 {
  margin: 0 0 .7rem;
  font-size: clamp(1.75rem, 4.5vw, 2.35rem);
  line-height: 1.35;
  letter-spacing: .02em;
  font-weight: 700;
}

.hero .greet {
  font-weight: 400;
  color: var(--muted);
}

.hero .lede {
  margin: 0;
  max-width: 33rem;
  font-size: 1.05rem;
  line-height: 1.9;
}

/* ---------- 区块标签 ---------- */
.label {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 .4rem;
  font-size: .78rem;
  font-weight: 400;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}

.label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* ---------- 文章列表 ---------- */
.post-list { padding-bottom: .5rem; }

.post-list article {
  padding: 1.85rem 0;
  border-top: 1px solid var(--rule);
}

.post-list article:first-child { border-top: 0; }

.post-title {
  display: inline;
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.5;
}

a.post-title { transition: color .25s ease; }

a.post-title:hover { color: var(--accent); }

.post-title .arrow {
  color: var(--accent);
  opacity: 0;
  transition: opacity .25s ease;
}

a.post-title:hover .arrow { opacity: 1; }

.post-list .excerpt {
  margin: .5rem 0 .8rem;
  max-width: 35rem;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--muted);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: .9rem;
  font-size: .84rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.post-meta .sep { color: var(--faint); }

.post-meta .tag {
  letter-spacing: .12em;
}

.post-meta .tag::before {
  content: "#";
  color: var(--accent);
  margin-right: .15em;
}

.more-link {
  display: inline-block;
  margin: 1.8rem 0 1rem;
  font-size: .95rem;
  color: var(--muted);
  transition: color .2s ease;
}

.more-link:hover { color: var(--accent); }

/* ---------- 归档 ---------- */
.year-head {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin: 2.6rem 0 .4rem;
  scroll-margin-top: 2rem;
}

.year-head:first-of-type { margin-top: 2.2rem; }

.year-head h2 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.year-head .count {
  font-size: .82rem;
  color: var(--muted);
  font-family: var(--mono);
}

.archive-list { padding-bottom: 1rem; }

.archive-list a.row {
  display: grid;
  grid-template-columns: 4.6rem 1fr;
  align-items: baseline;
  gap: 1rem;
  padding: .8rem .6rem;
  margin: 0 -.6rem;
  border-bottom: 1px solid var(--rule);
  border-radius: .35rem;
  transition: background-color .2s ease;
}

.archive-list a.row:hover { background: var(--code-bg); }

.row time {
  font-size: .88rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-family: var(--mono);
}

.row .row-title {
  font-size: 1.02rem;
  letter-spacing: .01em;
}

.row .row-title .tag-inline {
  font-size: .78rem;
  color: var(--muted);
  margin-left: .6rem;
  letter-spacing: .1em;
}

/* ---------- 关于页 ---------- */
.about-section { padding: 2.6rem 0 .6rem; }

.about-section:first-of-type { padding-top: 0; }

.about-section p { margin: 0 0 1.4rem; }

.now-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.now-list li {
  display: flex;
  gap: .9rem;
  padding: .55rem 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 1rem;
}

.now-list li:last-child { border-bottom: 0; }

.now-list .bullet {
  color: var(--accent);
  flex: 0 0 auto;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem 1.6rem;
  font-size: .98rem;
}

.contact-links a {
  color: var(--muted);
  transition: color .2s ease;
}

.contact-links a:hover { color: var(--accent); }

/* ---------- 文章内页 ---------- */
.back-link {
  display: inline-block;
  margin: 2.2rem 0 0;
  font-size: .88rem;
  color: var(--muted);
  letter-spacing: .04em;
  transition: color .2s ease;
}

.back-link:hover { color: var(--accent); }

.post-head { margin: 2rem 0 2.2rem; }

.post-head h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 4.5vw, 2.3rem);
  line-height: 1.4;
  letter-spacing: .02em;
  font-weight: 700;
}

.prose { padding-bottom: 1rem; }

.prose p { margin: 0 0 1.5rem; }

.prose h2 {
  margin: 2.6rem 0 1.1rem;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .02em;
}

.prose blockquote {
  margin: 0 0 1.5rem;
  padding: .15rem 0 .15rem 1.25rem;
  border-left: 2px solid var(--accent);
  color: var(--muted);
}

.prose blockquote p { margin: 0 0 .6rem; }

.prose ul { margin: 0 0 1.5rem; padding-left: 1.4rem; }

.prose li { margin-bottom: .55rem; }

.prose code {
  font-family: var(--mono);
  font-size: .87em;
  background: var(--code-bg);
  padding: .12em .4em;
  border-radius: .3em;
}

.prose .note {
  font-size: .9rem;
  color: var(--muted);
}

.post-end {
  margin: 3.2rem 0 0;
  text-align: center;
  color: var(--faint);
  font-size: 1.05rem;
  letter-spacing: .55em;
  text-indent: .55em; /* 让 ✦ 视觉居中 */
  user-select: none;
}

.post-nav {
  margin-top: 2.6rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}

.post-nav a {
  max-width: 46%;
  font-size: .93rem;
  color: var(--muted);
  transition: color .2s ease;
}

.post-nav a:hover { color: var(--accent); }

.post-nav small {
  display: block;
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--faint);
  margin-bottom: .3rem;
}

.post-nav .next {
  margin-left: auto;
  text-align: right;
}

/* ---------- 页脚 ---------- */
.site-foot {
  margin-top: 4.6rem;
  padding: 2.4rem 0 3.4rem;
  border-top: 1px solid var(--rule);
  font-size: .86rem;
  color: var(--muted);
}

.site-foot .row-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-foot a {
  color: var(--muted);
  transition: color .2s ease;
}

.site-foot a:hover { color: var(--accent); }

.site-foot .foot-links {
  display: flex;
  gap: 1.3rem;
  font-variant-numeric: tabular-nums;
}

.site-foot .whisper {
  margin-top: .9rem;
  color: var(--faint);
  font-size: .8rem;
  letter-spacing: .05em;
}

/* ---------- 响应式 ---------- */
@media (max-width: 620px) {
  body { font-size: 1rem; }

  .site-head { padding-top: 2rem; padding-bottom: 1.6rem; }

  .site-nav { gap: 1rem; }
  .site-nav a { font-size: .86rem; }

  .hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.4rem;
    padding: 2.4rem 0 2.8rem;
  }

  .archive-list a.row {
    grid-template-columns: 3.4rem 1fr;
    gap: .7rem;
  }

  .row .row-title .tag-inline { display: none; }

  .post-nav { flex-direction: column; gap: 1.1rem; }
  .post-nav a { max-width: 100%; }
  .post-nav .next { margin-left: 0; text-align: left; }
}